using System;
using System.Math;
using Nemerle.Utility;

class Task018 : TaskBase
{
  override public SolveInt() : int
  {
    def input = @"
75
95 64
17 47 82
18 35 87 10
20 04 82 47 65
19 01 23 75 03 34
88 02 77 73 07 63 67
99 65 04 28 06 16 70 92
41 41 26 56 83 40 80 70 33
41 48 72 33 47 32 37 16 94 29
53 71 44 65 25 43 91 52 97 51 14
70 11 33 28 77 73 17 78 39 68 17 57
91 71 52 38 17 14 91 43 58 50 27 29 48
63 66 04 68 89 53 67 30 73 16 69 87 40 31
04 62 98 27 23 09 70 98 73 93 38 53 60 04 23";

    // Transform into 2-dim array
    def dataArr = input
      .Split(array[ Environment.NewLine ], StringSplitOptions.RemoveEmptyEntries)
      .Map(x => x.Split(' ').Map(int.Parse));
    
    // Calculation cycles
    for (mutable i = dataArr.Length - 1; i > 0; i--)
      for (mutable j = 0; j < dataArr[i].Length - 1; j++)
        dataArr[i - 1][j] += Max(dataArr[i][j], dataArr[i][j + 1]);
    
    dataArr[0][0]
  }
}
